The tenth canto is specially notable as bringing Dante into the presence of the greatest exponent of the Scholastic philosophy, and the master whom he followed more closely than any other, St. Thomas Aquinas. In the eleventh, the illustrious Dominican recounts the life of St. Francis of Assisi, the founder of the rival order. This is one of the most notable passages in the whole poem, rising as it does to a sustained magnificence of diction which especially characterises those portions of the _Paradise_ where the poet allows full play to his genius. Justinian’s roll-call of the Roman achievements in Canto vi. is another. Nothing at all like them is found in the two former divisions of the poem; and it is to them that students who wish to feel the attraction which the _Paradise_ undoubtedly exercises over those who know it well, should first turn.
The sphere of the Sun, in which we now are, is, it should be noted, one of the two regions of Heaven in which Dante makes the longest stay, the other being that of the Fixed Stars. The passage to it marks a distinct stage in his progress. Looking back to the end of Canto ix. we see that it forms a kind of peroration; while the first twenty-seven lines of Canto x. are, as it were, the introduction to a fresh division of the poem, and recall certain phrases which occurred in the opening canto. It is difficult to say why these two spheres should be made of so much more importance than the rest. Mars is the only one which approaches them; but this is selected by Dante as the scene of his interview with his ancestor Cacciaguida, which gives the occasion for the magnificent contrast between the old days of Florence and its present state, and the prophecy of his own exile; subjects which might well occupy a considerable space. On the other hand, the eulogy of St. Francis, already referred to, which St. Thomas Aquinas delivers, and that of St. Dominic, with which St. Bonaventura, “vying with the courtesy of so mighty a paladin,” responds to it, fine as they are, do not appear indispensable in the scheme of the poem. But the whole plan of the _Paradise_ is, so far as can be seen, arranged with much less of obvious symmetry than is to be found in the two former _Cantiche_. No doubt the plan is there; but just as “time-indications” for the most part fail us, or can be extracted only by elaborate and somewhat uncertain calculations, so it would seem as if the poet, no longer hampered by the necessities of time and space, had wished to show how he could work with no self-made restrictions.